So does the Sanwu ampboard trip protection with low dcr inductors then ? NO ! It still doesn't trip protection. Diodedrop on meter never really well above 300mV, so can't be that. So is this board design so much better than gmarsh and dugs and Sure ? Still odd.
Bass is plenty now and treble is far more decent and detailed too now, could be called hifi now and many amps cannot perform this decent with this load, bass does no longer disappear with level, the inductors are slightly, 1mm in width, too large for me.
Next to 4 ceramics that combine to measured 300nF there now is 2660uF, two 20mOhm Panasonics and two 9mOhm Nichicons 🙂 Oh psu change for Nichicons too, gains still at standard level, diode still there, no snubbers. Just parts at hand, after searching little better/longer 😛
Bass is plenty now and treble is far more decent and detailed too now, could be called hifi now and many amps cannot perform this decent with this load, bass does no longer disappear with level, the inductors are slightly, 1mm in width, too large for me.
Next to 4 ceramics that combine to measured 300nF there now is 2660uF, two 20mOhm Panasonics and two 9mOhm Nichicons 🙂 Oh psu change for Nichicons too, gains still at standard level, diode still there, no snubbers. Just parts at hand, after searching little better/longer 😛
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It does trip protection if your signal is high enough, like all those chips. Hook up a scope and see for yourself.
If yours don't, the PSU can't deliver the current needed to trip.
If yours don't, the PSU can't deliver the current needed to trip.
14A psu now, that let multiple dugss multiple gmarsh and multiple sure multiple audiobah and multiple hiamps and well any 3118/3116 even 4 dugs together on only one of these psu's , back to saying it must be psu, funny
Last time it was gmarsh3118 tripping protection that was caused by these psu's and now it is the lack of tripping protection of similar Sanwu at same time that is also caused by these psu's. That is funny doctormord, hilarious even. Even more fun it was to service department when I showed up with all 4 of them to have them checked because someone online tried to convince me the powersupplies where responsible for tiny amp protection tripping, single ampboard on all 4 off them, all employees had good laugh, I am an total idiot, but not twice so.
From the data sheet:
"If automatic recovery from the short circuit protection latch is desired, connect the FAULTZ pin directly to the SDZ pin. This allows the FAULTZ pin function to automatically drive the SDZ pin low which clears the shortcircuit protection latch."
My boards are wired this way. (pin 2 and pin 3)
I wonder if all are.
doctormord?
gmarsh ?
Anyone with "offshore" boards?
"If automatic recovery from the short circuit protection latch is desired, connect the FAULTZ pin directly to the SDZ pin. This allows the FAULTZ pin function to automatically drive the SDZ pin low which clears the shortcircuit protection latch."
My boards are wired this way. (pin 2 and pin 3)
I wonder if all are.
doctormord?
gmarsh ?
Anyone with "offshore" boards?
Irribeo, nice job, what sort and value(A, mohm, uH) inductors are those? Would you say it's worth the upgrade?
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I had these Wurth inductors, datasheet says they are 10 (+/-0.4) width, mine probably are 10.4mm wide, that would be nicer if I shave off the 0.4mm, there really is little room on pcb and placing the inductors without them touching the tiny smd's the 0.4mm less would be nice 🙂 Probably ok if you put inductors on without electrolytics or wires but I replaced the inductor without removing other parts I already put on and that makes it harder. The little old ones are 10mm I think, but could be 9.8mm too, just a little easier to place.
Little Sanwu remains cooler than Sure3116 or audiobah or Ydbz or gmarsh3118 or as cool as dugs3116, after hours of producing significantly higher level output than any other can. Iddle there isn't warmth now either.
Value inductor depends on speaker used and these drop some too
http://www.mouser.com/ds/2/445/7443330820-538761.pdf
Little Sanwu remains cooler than Sure3116 or audiobah or Ydbz or gmarsh3118 or as cool as dugs3116, after hours of producing significantly higher level output than any other can. Iddle there isn't warmth now either.
Value inductor depends on speaker used and these drop some too
http://www.mouser.com/ds/2/445/7443330820-538761.pdf
Thanks, I'm looking for 22uH for 8ohm speakers, that will fit and take high current, not so easy locally. What is the recommended minimum current for the inductor?
im not really feeling the love for these mono blocks😀
been playing,trying different caps and inductors and gains and still come to the conclusion that a breeze/nobsound wlx board wipes the floor with them,shame as i really like these boards,the dimensions and build.....im still in with it,ill order some replacement smd parts to replace on the board and see if if can get some life and excitement out of these boards that i know the 3116 sound is capable off🙂.
just to confirm,as i never got a reply or answer to this question when i asked before....
are we sure that these chips...ie "3116" and "3118" are the same sound and presentation wise other then requiring different cooling needs and solutions?
still,all good fun😎
been playing,trying different caps and inductors and gains and still come to the conclusion that a breeze/nobsound wlx board wipes the floor with them,shame as i really like these boards,the dimensions and build.....im still in with it,ill order some replacement smd parts to replace on the board and see if if can get some life and excitement out of these boards that i know the 3116 sound is capable off🙂.
just to confirm,as i never got a reply or answer to this question when i asked before....
are we sure that these chips...ie "3116" and "3118" are the same sound and presentation wise other then requiring different cooling needs and solutions?
still,all good fun😎
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Nice effort to work it but I think you may have removed all the benefits of what made the Sanwu great: extremely compact layout. The closeness of all the components (3mm in some cases) makes it sound clean. All of the large parts hanging off start acting like antennas for pickup and emission. Anyhow what is it about the other amps that sounds better?
It would appear that the 3116, 3118, and 3130 are all the same chip internally as all ratings are identical, but for the different thermal resistances and max power. The DAP packages are thermal pad down (3118 and 3130) and pad up for external heat sink is the DAD package (3116). All other ratings besides thermal and max output power are identical. I am not sure why 3130 and 3118 are different given same DAP (pad down) structure.
http://www.ti.com/lit/ds/symlink/tpa3116d2.pdf
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3130 is weaker also in datasheet
Are the chinese tpa3118 on Sanwu the same as TI tpa3118, they don't look the same and they don't behave the same, but that part could be better layout. normally a chinese clone can't deliver more power than original, so that makes it very unlikely and I don't know other tiny chips that drive low impedance easily.
Are the chinese tpa3118 on Sanwu the same as TI tpa3118, they don't look the same and they don't behave the same, but that part could be better layout. normally a chinese clone can't deliver more power than original, so that makes it very unlikely and I don't know other tiny chips that drive low impedance easily.
What makes you think they may not be genuine TI chips? The little notch on high magnification? It seems to work pretty well, sounds good, and drive an honest 60w. May just be a product variation with progress in time.
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hi guys
i know my "handy work" wont be doing the little boards any favours😀 and will certainly cause this and that,at present im not worried about any of that.
what im trying to do is find out if theres some iffy components on the board(other then my own now😀) that gives this board such mellow and weak bass from the get go......if i cant get rid of that then i wont be using them😛
i know my "handy work" wont be doing the little boards any favours😀 and will certainly cause this and that,at present im not worried about any of that.
what im trying to do is find out if theres some iffy components on the board(other then my own now😀) that gives this board such mellow and weak bass from the get go......if i cant get rid of that then i wont be using them😛
Your tpa3118 look ok I believe, but the marking location on many isn't same as digikey/mouser tpa3118 chips, few places I have seen so far that sell the more centermarked tpa3118, there is also just one seller selling completely centermarked tpa3130
If anyone wants to try out something completely different, i have some spare MAX9709 boards available, build and tested without volume pot. (10k log).
PVCC up to 24V, 2x25WBTL or 50WPBTL. All Murata MLCC and Nichicon or ChemiCon bulk caps.
"Sound" is a bit different to the TI chips, people say "warm full bass".
Just let me know.
PVCC up to 24V, 2x25WBTL or 50WPBTL. All Murata MLCC and Nichicon or ChemiCon bulk caps.
"Sound" is a bit different to the TI chips, people say "warm full bass".
Just let me know.
